A new member: with a question right away...

[Äkbar Äsghar]

Hi,
My name is Akbar and I am from Pakistan. I am an amateur who loves to do simple electrical DIY at home. So please bear with my non-technical lingo.

Question:
I want to add an LED at the red-circled spot, indicating the ON position of the switch in this switch/socket circuit.


Please tell me what do I need (beside LED) and how can I make it work.
If I have failed to mention something please let me know.
I am waiting for your replies...

 

[telectrix]

that circled hole is for fixing screw. you will need to drill another hole. better with a neon and resistor than a LED.

 

[Äkbar Äsghar]

that circled hole is for fixing screw. you will need to drill another hole. better with a neon and resistor than a LED.

that I know, but I want to add an LED anyway.
I am here to know, how.

 

[Äkbar Äsghar]

Would someone plz answer this. I m unable to post in any other section

 

[telectrix]

what voltage at socket? ac or dc?

 

[Äkbar Äsghar]

220v AC

 

[telectrix]

so for a LED, you need to step down the voltage and rectify to dc. LED requiers 2V dc. better with neon ( 90V) with a resistor.

 

[Äkbar Äsghar]

What resistor wud u recommend with it, can u gv a rough idea where neon and resistor will go? And plz dumb it down a bit for me

 

[Marvo]

Here's a basic circuit but you'd be better buying a complete indicator lamp and dismantling to fit it in your socket.



*Edit* I don't have time to do the current calcs but that resistor I drew as 2.7Kohms might need to be a higher value, maybe try 4.2Kohms to start with and if it's a bit dim drop it 500ohms at a time. Just watch the temperature of the LED, if you go too low the current will be too high any you'll get thermal runaway.

 

[Äkbar Äsghar]

Here's a basic circuit but you'd be better buying a complete indicator lamp and dismantling to fit it in your socket.

View attachment 24016

*Edit* I don't have time to do the current calcs but that resistor I drew as 2.7Kohms might need to be a higher value, maybe try 4.2Kohms to start with and if it's a bit dim drop it 500ohms at a time. Just watch the temperature of the LED, if you go too low the current will be too high any you'll get thermal runaway.

Your reply is really helpful but I'm new to such projects, can you please specify the exact ratings/values for the capacitor, resistor and diode.

 

[Spoon]

You could use one of these....
L0569AWNAE - ARCOLECTRIC SWITCHES - NEON INDICATOR, RED | CPC

 

[Spoon]

Too earliy in the morning.... I didnt spot Marvo's link. (Post 9) Someone else likes CPC.

 

[Geordie Spark]

and he wants it immediately!!

I don't suppose he'll want to wait 48 hours for a doctors prescription either.